mirror of
https://github.com/denoland/deno.git
synced 2024-10-30 09:08:00 -04:00
223 lines
6.7 KiB
C++
223 lines
6.7 KiB
C++
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
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#include "exceptions.h"
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#include "internal.h"
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using deno::ClearException;
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using deno::DenoIsolate;
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using deno::HandleException;
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using v8::Boolean;
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using v8::Context;
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using v8::EscapableHandleScope;
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using v8::HandleScope;
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using v8::Integer;
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using v8::Isolate;
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using v8::Local;
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using v8::Locker;
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using v8::Module;
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using v8::Object;
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using v8::ScriptCompiler;
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using v8::ScriptOrigin;
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using v8::String;
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using v8::Value;
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v8::MaybeLocal<v8::Module> ResolveCallback(Local<Context> context,
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Local<String> specifier,
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Local<Module> referrer) {
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auto* isolate = context->GetIsolate();
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v8::Isolate::Scope isolate_scope(isolate);
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v8::Locker locker(isolate);
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DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
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v8::EscapableHandleScope handle_scope(isolate);
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deno_mod referrer_id = referrer->GetIdentityHash();
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auto* referrer_info = d->GetModuleInfo(referrer_id);
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CHECK_NOT_NULL(referrer_info);
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for (int i = 0; i < referrer->GetModuleRequestsLength(); i++) {
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Local<String> req = referrer->GetModuleRequest(i);
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if (req->Equals(context, specifier).ToChecked()) {
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v8::String::Utf8Value req_utf8(isolate, req);
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std::string req_str(*req_utf8);
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deno_mod id = d->resolve_cb_(d->user_data_, req_str.c_str(), referrer_id);
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// Note: id might be zero, in which case GetModuleInfo will return
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// nullptr.
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auto* info = d->GetModuleInfo(id);
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if (info == nullptr) {
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char buf[64 * 1024];
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snprintf(buf, sizeof(buf), "Cannot resolve module \"%s\" from \"%s\"",
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req_str.c_str(), referrer_info->name.c_str());
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isolate->ThrowException(deno::v8_str(buf));
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break;
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} else {
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Local<Module> child_mod = info->handle.Get(isolate);
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return handle_scope.Escape(child_mod);
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}
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}
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}
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return v8::MaybeLocal<v8::Module>(); // Error
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}
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extern "C" {
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deno_mod deno_mod_new(Deno* d_, bool main, const char* name_cstr,
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const char* source_cstr) {
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auto* d = deno::unwrap(d_);
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return d->RegisterModule(main, name_cstr, source_cstr);
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}
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const char* deno_mod_name(Deno* d_, deno_mod id) {
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auto* d = deno::unwrap(d_);
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auto* info = d->GetModuleInfo(id);
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return info->name.c_str();
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}
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size_t deno_mod_imports_len(Deno* d_, deno_mod id) {
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auto* d = deno::unwrap(d_);
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auto* info = d->GetModuleInfo(id);
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return info->import_specifiers.size();
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}
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const char* deno_mod_imports_get(Deno* d_, deno_mod id, size_t index) {
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auto* d = deno::unwrap(d_);
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auto* info = d->GetModuleInfo(id);
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if (info == nullptr || index >= info->import_specifiers.size()) {
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return nullptr;
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} else {
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return info->import_specifiers[index].c_str();
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}
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}
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void deno_mod_instantiate(Deno* d_, void* user_data, deno_mod id,
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deno_resolve_cb cb) {
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auto* d = deno::unwrap(d_);
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deno::UserDataScope user_data_scope(d, user_data);
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auto* isolate = d->isolate_;
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v8::Isolate::Scope isolate_scope(isolate);
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v8::Locker locker(isolate);
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v8::HandleScope handle_scope(isolate);
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auto context = d->context_.Get(d->isolate_);
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v8::Context::Scope context_scope(context);
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v8::TryCatch try_catch(isolate);
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{
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CHECK_NULL(d->resolve_cb_);
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d->resolve_cb_ = cb;
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{
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auto* info = d->GetModuleInfo(id);
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if (info == nullptr) {
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return;
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}
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Local<Module> module = info->handle.Get(isolate);
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if (module->GetStatus() == Module::kErrored) {
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return;
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}
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auto maybe_ok = module->InstantiateModule(context, ResolveCallback);
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CHECK(maybe_ok.IsJust() || try_catch.HasCaught());
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}
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d->resolve_cb_ = nullptr;
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}
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if (try_catch.HasCaught()) {
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HandleException(context, try_catch.Exception());
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}
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}
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void deno_mod_evaluate(Deno* d_, void* user_data, deno_mod id) {
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auto* d = deno::unwrap(d_);
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deno::UserDataScope user_data_scope(d, user_data);
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auto* isolate = d->isolate_;
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v8::Isolate::Scope isolate_scope(isolate);
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v8::Locker locker(isolate);
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v8::HandleScope handle_scope(isolate);
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auto context = d->context_.Get(d->isolate_);
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v8::Context::Scope context_scope(context);
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auto* info = d->GetModuleInfo(id);
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auto module = info->handle.Get(isolate);
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auto status = module->GetStatus();
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if (status == Module::kInstantiated) {
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bool ok = !module->Evaluate(context).IsEmpty();
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status = module->GetStatus(); // Update status after evaluating.
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if (ok) {
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// Note status can still be kErrored even if we get ok.
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CHECK(status == Module::kEvaluated || status == Module::kErrored);
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} else {
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CHECK_EQ(status, Module::kErrored);
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}
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}
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switch (status) {
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case Module::kEvaluated:
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ClearException(context);
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break;
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case Module::kErrored:
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HandleException(context, module->GetException());
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break;
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default:
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FATAL("Unexpected module status: %d", static_cast<int>(status));
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}
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}
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void deno_dyn_import_done(Deno* d_, void* user_data,
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deno_dyn_import_id import_id, deno_mod mod_id,
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const char* error_str) {
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auto* d = deno::unwrap(d_);
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CHECK((mod_id == 0 && error_str != nullptr) ||
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(mod_id != 0 && error_str == nullptr) ||
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(mod_id == 0 && !d->last_exception_handle_.IsEmpty()));
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deno::UserDataScope user_data_scope(d, user_data);
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auto* isolate = d->isolate_;
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v8::Isolate::Scope isolate_scope(isolate);
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v8::Locker locker(isolate);
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v8::HandleScope handle_scope(isolate);
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auto context = d->context_.Get(d->isolate_);
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v8::Context::Scope context_scope(context);
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auto it = d->dyn_import_map_.find(import_id);
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if (it == d->dyn_import_map_.end()) {
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CHECK(false); // TODO(ry) error on bad import_id.
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return;
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}
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/// Resolve.
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auto persistent_promise = &it->second;
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auto promise = persistent_promise->Get(isolate);
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auto* info = d->GetModuleInfo(mod_id);
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// Do the following callback into JS?? Is user_data_scope needed?
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persistent_promise->Reset();
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d->dyn_import_map_.erase(it);
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if (info == nullptr) {
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// Resolution error.
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if (error_str != nullptr) {
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auto msg = deno::v8_str(error_str);
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auto exception = v8::Exception::TypeError(msg);
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promise->Reject(context, exception).ToChecked();
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} else {
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auto e = d->last_exception_handle_.Get(isolate);
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ClearException(context);
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promise->Reject(context, e).ToChecked();
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}
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} else {
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// Resolution success
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Local<Module> module = info->handle.Get(isolate);
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CHECK_EQ(module->GetStatus(), v8::Module::kEvaluated);
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Local<Value> module_namespace = module->GetModuleNamespace();
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promise->Resolve(context, module_namespace).ToChecked();
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}
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d->isolate_->RunMicrotasks();
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}
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} // extern "C"
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